P2307
Ignition Coil C Primary Control Circuit High
The primary control voltage at ignition coil C exceeds the upper limit, suggesting a short to battery or an open primary winding.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Primary shorted to batteryCommon
- Open primary windingPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Ignition Coil
- Coil Driver
- Ignition Wiring
P2307 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.